CATCH RATE FOR THE SKIPJACK TUNA (Katsuwonus pelamis) IN THE SOUTHWEST OF THE SOUTH ATLANTIC OCEAN

被引:0
|
作者
Andrade, Humber Agrelli [1 ]
机构
[1] Univ Fed Santa Catarina, INE CTC, BR-88010970 Florianopolis, SC, Brazil
来源
BOLETIM DO INSTITUTO DE PESCA | 2008年 / 34卷 / 03期
关键词
GLM; CPUE; abundance index; pole and line; standardized CPUE;
D O I
暂无
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Catch rates may be used as abundance indices of populations exploited by commercial fishing fleets. However catch rates must reflect temporal trends of the biomass and they can not be biased due to factors such as changes in the coefficient of vulnerability. In this paper generalized linear models were used to estimate catch rates of skipjack (Katsuwonus pelamis) caught in the southwest of the South Atlantic Ocean. Gamma density function and logarithm link function were used to model the variable of interest. The coefficient of variation as calculated for the annual catch rates were all close to 0.15. The variations of the catch rates did not show time trends. Therefore the biomass of the population probably did not changed much in the last twenty years.
引用
收藏
页码:391 / 402
页数:12
相关论文
empty
未找到相关数据